Hello gents, and thanks !
-Vacajun
I am quite busy so I spent a lot of time only to upgrade and close this P-40 series, and as my mothertongue isn't english, this would be long for me to write a mini-weathering tutorial.
But I can tell you some tips, I hope, interesting :
-you have to study where and how dirt is present on the aircraft, and what kind of chemicals are concerned (gas, oil, exhaust and powders, or melting effects...)
-then you must identify the paint modifications, such as patches, repaints, climate use, and so on...
-All these different points must be seperated on different layers that you will set, in transparency for instance.
-the combination of these effects with your material effects (metal/aluminium, canvas or wooden parts) will bring you a large palette of nice global renders.
-remember : weathering is one of the last steps in profiles. You first have to focus on technical precision and all lights/shadows effects.
Hope it might help...
-GrubbyFingers
Let's try Wan Wan, chinese fashioned like... (must means something ridiculous, I'll ask my wife !)

I thought about doing Aussie birds (RAAF and RNZAF are my favourite WWII air forces) but finally few P-40K-10/15, M, N-1 were used. I've got some N-1 sources but these planes are very standard, especially when they're compared to 'hot stuff' or 'Cleopatra III'.
My problem, if want to do a P-40E or N-5 (and over) model, is that I have to edit all my layers, for canopy or fuselage changes... it's a big big piece of work....
So nothing is in progress actually. The easiest series based on what I've already done is about VVS. It will depend on my taste and free time...
Best regards,
Macwan.